Your model is very photogenic and is eloquently dressed, however, capturing her with the distractions of the car/window may not have been the best move. Also, there is room for improvement with the color contrast. You should enter her again if possible, but as a portrait and in a much different (less distracting and more interesting) setting. Your photo would rate much higher. Good luck.
With all due respect, she's a very pretty woman, but this shot just feels too much like a snapshot to me. The window and mirror are taking too much away from your main subject. I would love to see more of her, her dress and makeup are very eye catching and I'm sure would be wonderful to photograph outside of that car.